Core-strengthening bar



(No Model.)

E. NIVER.

GORE STRENGTHBNING BAR.

N0. 344,398- Patented June 29, 1886.

erica.

EDVARD NIVER, OF MUSCATINE, IOVA.

CORE-STRENGTHENING BAR.`

SEPECEFICA TTON forming part of Letters Patent No. 344,398, dated June29, 1886.

Application liled January l, 1885.

To @ZZ whom it may concern:

Be it k nown that I, EDWARD Nivea, a citizen of the United States, and aresident of Museatine, Muscatine county, Iowa, have inventedcertainImprovements in CoreStrengt-hening Bars, of which the following is aspecification.

My invention relates to improvements in the manufacture of green sandcores having strengthening rods or bars embedded therein and made insections, the objects of my improvements being to facilitate themanufacture of such cores, and to provide for the ready removal of thestrengthening-bars therefrom when it is desired to remove the core fromthe casting.

In making a green-sand core with my sectional core-bars I use a core-boxwhich may be parted, as usual, or hinged together at one side, and whichhas formed in it recesses of such a character that when the box isclosed they will coincide with each other and form a mold of the desiredshape for the Core. rIhe core-box forms no essential part of myinvention, however, the latter relating to the'mcth1 od of constructingand tting together the strengtheningbars which are embedded in the core.

In the accompanying drawings, Figure l is a section of a T-pipe having acore with strengthening-bars made in accordance with my invention. Fig.2 is a view of an S-trap with a core provided with my improved bars.Fig. 3 is a perspective view of parts ofthe bars shown in Fig. l; Figs.4 and 5, enlarged sectional views of the joint between the bars, andFig. 6 a sectional view showing another plan of constructing the joint.

The core shown in Fig. l of the drawings is for a T-pipe, and isstrengthened bytwo bars, a @arranged at right angles to each other; butit should be understood that the bars may be arranged at differentangles, as cores are of different shapes and the bars follow the generalshape of the core. Thus, in Fig. 2 the core for an S-trap isstrengthened by three bars, a, a', and a2.

In the bar a is a mortise, b, and on one end of the bar a is a tenen,b', adapted to lit loosely into this mortise, the joint being renderedsecure by a key, d.

The mortise b and tenon b are preferably Serial No. 152.611. (No model.)

beveled, as shown in Figs. 3 and 5, and either the mortise or tcnon isrecessed on one side and provided with a corresponding projection on theopposite side, so that the bearing upon one side of the mortise is atthe two points x x, and upon the opposite side at the central point, y,which forms a bearing for the conlining-key d.

In Figs. l, 3, and l I have shown the mortise constructed to form thebearing-points, the tenon being made with straight sides; but thebearing-points may be lnade by a proper construction of the tcnou, ifdesired, the mortise having opposite straight sides, as shown in Fig. 6,for instance.

\Vlien the core-strengthening bars are constructed and and fittedtogether in accordance with my invention, they are iirmly braced andwill retain their proper positions during the handling of the core, theremoval of the same from the core-bo.\f, and the setting in the mold;but when it is desired to remove the bars from the core after thecompletion of the casting the keys l may be readily loosened by simplyrapping upon the ends of the bars,

which are exposed by cutting away portions of the ends of the core or bydiscontinuing the core some distance from the ends of the bars, asshown. This loosening of the keys is materially facilitated by the factthat said keys have a bearing of contracted area upon the mortise ortenen at the point y. When loosened, the bars can be readily withdrawnin the direction of their length, thekeys leaving the mortises with thetenons as the bars are withdrawn.

Owing to the beveled edges of the tenon and mortise, the tenen has abearing upon the broad side of the mortise when the key has been drivento its place, as will be understood on reference to Fig. 5.

I claim as my invention- 1. The combination of a core withstrengthening-bars united by a tenon-and-mortise joint with binding-keyextending lengthwise of the tenen, and bearing against a projection onone of the two elements of the joint, all substantially as specified.

2. The combination of corest-rcngthening bars, one having a mortise andthe other a tenon adapted thereto, with a binding-key ex- IOC tendinglengthwise of the tenon, said mortise ments of the joint, allsubstantially as speci and tenon being constructed, as described, so ed.

as to form bearing points x on one side, and In testimony whereof Ihavesigned-my name a bearing-point, y, on the opposite side, all to thisspecification in the presence of two 5 substantiallyas specified.subscribing witnesses.

3. The combination of corestrengthening bars connected bytenon-and-mortise joints EDVARD NIVIR having beveled edges with thebinding-key Witnesses: extending lengthwise of the tenon, and bear-THos. Gr. TAYLOR,

1o ing against a projection on one of the two ele- J. E. STEVENsoN.

